1. The Second Clinical Medical College, Guizhou University of Traditional Chinese Medicine, Guiyang 550001, China
2. The First Clinical Medical College, Guizhou University of Traditional Chinese Medicine, Guiyang 550001, China
3. Department of Endoscopy, Guizhou Provincial People's Hospital, Guiyang 550002, China
4. Department of Pathology,
Guizhou Provincial People's Hospital, Guiyang 550002, China